The secret of the Binchotan charcoal eye mask is the simple but revolutionary four-layer structure. A sheet of Binchotan Charcoal is layered into the mask which emits infrared rays that gently help stimulate blood flow to heal and soothe the eye area. The eye mask is fragrance free, smooth and silky to the touch, with soft and comfortable padding to pamper your eyes. It is great for relaxation, meditation, stress relief, airplane travel and a restful sleep. Your entire body will feel the benefit.